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Table 1 Classification and diagnosis of temporomandibular disorder subgroups based on Research Diagnostic Criteria for Temporomandibular Disorders

From: Effects of phototherapy on muscle activity and pain in individuals with temporomandibular disorder: a study protocol for a randomized controlled trial

Group

Subgroup

I

A. Myofascial pain

B. Myofascial pain with limited opening

No group I diagnosis

II right

A. Disk displacement with reduction

B. Disk displacement without reduction with limited opening

C. Disk displacement without reduction without limited opening

No group II diagnosis

II left

A. Disk displacement with reduction

B. Disk displacement without reduction with limited opening

C. Disk displacement without reduction without limited opening

No group II diagnosis

II right

A. Arthralgia

B. Osteoarthritis of temporomandibular joint syndrome (TMJ)

C. Osteoarthritis of TMJ

No group III diagnosis

II left

A. Arthralgia

B. Osteoarthritis of TMJ

C. Osteoarthritis of TMJ

No group III diagnosis